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A slim jim (more technically known as a lockout tool) is a thin strip of metal (usually spring steel) roughly 60 centimetres (24 in) long and about 2–4 centimetres (0.79–1.57 in) wide originally marketed under that name by HPC Inc., a manufacturer and supplier of specialty locksmithing tools. Slim jims are used to unlock automobile doors ...
US Marines breach a door using a sledgehammer. Mechanical breaching can be used to defeat the latch, lock, hinges, or door itself and methods can vary from minimally destructive to very destructive. Lockpicking with traditional lock picks is a minimally destructive method but is relatively slow and requires a trained operator.
History. The Halligan bar was designed by New York City Fire Department (FDNY) First Deputy Chief Hugh Halligan in 1948 and was named after him. That same year, blacksmith Peter Clarke made the first prototype of the tool. [ 3] Despite its popularity among FDNY ladder companies, the department initially refrained from purchasing the tool to ...
Crash bar. Crash bar doors in a school, with upper vertical rod latches. A crash bar (also known as a panic exit device, panic bar, or bump bar) [ 1][ 2] is a type of door opening mechanism which allows users to open a door by pushing a bar. While originally conceived as a way to prevent crowd crushing in an emergency, crash bars are now used ...
The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.
Types. There are 3 basic types of swing door operators: Full Energy – It opens and closes the door at full speed. Low Energy – It opens and closes the door at reduced speed to limit the kinetic energy of the moving door to levels deemed safe for disabled users. Power Assist – This is a version of the low-energy operator.
Website. www.geniecompany.com. GMI Holdings Inc. ( dba The Genie Company) is an American manufacturer of garage door openers & related accessories. It was founded in 1923 as the Alliance Manufacturing Company, located in Alliance, Ohio. At the time the company produced a broad line of consumer, industrial and military products. [ 2]
The operator is placed in the space above the sliding door. An electric motor, geared down to get a lower speed and a higher torque, drives a pulley at one end of a belt. The door is clamped to the belt. To open the door, the motor turns the pulley, which in turn turns the belt, which in turn drags the door. To close the door, the reverse occurs.
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